Reduced Transport of Swimming Particles in Chaotic Flow due to Hydrodynamic Trapping
Reduced Transport of Swimming Particles in Chaotic Flow due to Hydrodynamic Trapping
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DOI：
10.1103/physrevlett.106.198104
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发表时间：
2011-05-13
影响因子：
8.6
通讯作者：
Ouellette, Nicholas T.
中科院分区：
文献类型：
--
作者：
Khurana, Nidhi;Blawzdziewicz, Jerzy;Ouellette, Nicholas T.
我们计算研究的主动，自推进颗粒悬浮在一个二维混沌流的运输。点状、球形粒子具有其自身的固有游动速度，这修改了动力学系统，使得粒子可以打破载体流中存在的传输障碍。令人惊讶的是，我们发现，游泳并不一定会导致增强粒子传输。小但有限的游泳速度可能会导致运输减少，因为游泳者会长时间被困在背景流中椭圆形岛屿附近形成的陷阱中。我们的研究结果对小型海洋生物的运输模型和遭遇率有影响。
We computationally study the transport of active, self-propelled particles suspended in a two-dimensional chaotic flow. The pointlike, spherical particles have their own intrinsic swimming velocity, which modifies the dynamical system so that the particles can break the transport barriers present in the carrier flow. Surprisingly, we find that swimming does not necessarily lead to enhanced particle transport. Small but finite swimming speed can result in reduced transport, as swimmers get stuck for long times in traps that form near elliptic islands in the background flow. Our results have implications for models of transport and encounter rates for small marine organisms.